Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 nm?L2?L1?50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

Abstract: Power supplies for pool and spa equipment are disclosed. In one embodiment, the power supply includes a buoyant housing, a peripheral float, at least one solar cell positioned on the buoyant housing for collecting sunlight and converting same to electrical energy, and a power cable for interconnecting the power supply and pool/spa equipment. In other embodiments, first and second inductive power couplings are provided for powering pool and spa equipment. The power couplings can also be installed using existing plumbing features of the pool or spa.

Abstract: A smokeless ashtray system includes a vacuum manifold connecting a plurality of ashtrays to a charcoal filter and a vacuum blower/motor assembly. The vacuum manifold includes spiral wound metal flexible metal tubing segments secured to connectors by heat shrink tubing. L connectors connect end most ashtray locations to the manifold, T connectors connect intermediate ashtray locations, and a four-way connector connects a central ashtray location to the manifold and to the charcoal filter and blower/motor assembly. Each ashtray location includes a flue member having a first end threaded into the associated connector and a second end inserted within a recess formed centrally in a bottom surface of a cup-shaped ashtray. A connector mounting bracket includes locating apertures engaging alignment pins extending from a flat upper surface of the connector, and a flange on the flue member clamps the bracket to the connector.